Don't give your energy to things that don't matter.
Don't get caught up in the latest drama at work. Don't give in to negative thinking about what went wrong last night. Don't waste your time getting back at your co-worker. Don't give your energy to things that don't matter.
Your time here on earth is limited. You need to focus your energies and use them for things that are important to you. That means giving some time each day or - at the very least - each week to things that you are trying to accomplish. That means CHOOSING to focus on the things that are important and allowing the ugly, negative, petty and useless things to pass you by.
Don't give your energy to things that don't matter. Use your energy to build yourself up, help others, nurture your spirituality and make a difference in life.
Because those are the things that matter.